import java.util.*;
public class one{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("你将输入的数的个数");
        int n = sc.nextInt();
        double all=0;
        for(int i=0;i<n;i++){
            all+=sc.nextInt();
        }
        System.out.println("平均值为"+all/n);
    }
}